Preboiler for steam-boilers.



W. 0. HOPPE.

PREBOILER POR STEAM BOILERYS. APPLICATION FILED APR.2, 19134 1,089,643, I Patented Mar.1o,1914.

fig.

UNITED STATES PATENT OFFICE.

WILLIAM O. HOPPE, OF LOS ANGELES, CALIFORNIA.

PREBOILER FOR STEAM-BOILERS.

To all whom it may concern.'

Be it known that I, WILLIAM O. Horrn, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles, State of California, have invented new and useful Improvements in Preboilers for Steam- Boilers, of which the following is a specification.

This invention relates to a device whose prime object is to remove the scale from water before use in a steam boiler; its object being to entirely obviate the necessity of l cleaning the scale from a boiler and to provide a means for catching the scale where it may be very easily cleaned out.

My idea of invention comprises fundamentally the pre-boiling of the water in receptacle at the same temperature at which it is to be subsequently boiled in the boiler; and the means of my invention take the form of one or more receptacles for settling and holding the scale from the water passing through the receptacle into the boiler'. Means are provided for easily cleaning the receptacle, either by blowing ofl the scale which accumulates in its bottom or, in eX- treme cases, by removing the receptacle and thoroughly cleaning it.

In its more specific aspects my invention also comprises a particular formation and arrangement of the receptacles, which is hereinafter to be described; and further comprises the combination with these receptacles placed inside the boiler, of similar receptacles placed in the combustion chainber of the boiler to heat the water before passing to the receptacles within the boiler.

Other objects and advantages of my invention will appear in the following specification, wherein reference is had to the accompanying drawings, in which:

Figure l is a longitudinal vertical sect-ion with a boiler equipped with my invention. Fig. 2 is a transverse vertical section thereof. Fig. 3 is a sectional plan showing a preferred arrangement of receptacles in the combustion chamber of the boiler. Fig. 4 is a detailed longitudinal section illustrating the construction and inter-connection of my pre-boiling receptacles. Fig. 5 is a section taken on line 5-5 of Fig. 4.

In the drawings 10 may designate a boiler of any standard design, 11 the flues thereof and 12 and 13 its front and back heads respectively. Furnace walls 14 surround the boiler in the ordinary manner to form a Specification of Letters Patent.

Application sied April 2, 191e.

Patented Mar. 1o, 1914.

Serial No. 758,432.

combustion chamber l5 around and beneath it. The feed water for the boiler is supplied through pipe 20 passing through head 12 to the forwardmost pre-boiling receptacle or drinn 2l. There may be as many drums 2l as is deemed desirable, or as many as may be placed in the space above tubes l1 within the boiler. (I preferably place the drums slightly to one side of the center so as not to interfere with the manhole opening which is in the center.) Each of the drums 2l is composed of a preferably sheet iron shell 22 and front and back heads 23 and 24. The shell 22 is made in the configuration shown in Figs. et and 5, being oval in section so as to make the drums of the largest possible capacity which will pass through the manhole 122L in head l2. Although the manhole 12l is arranged with its longer axes horizontal, the drums, after they are passed through the manhole, are turned to a position with their longer aXes vertical, so as to afford the greatest possible distance between the scale 25 which settles in the bottom of the drum and the stream of water flowing through the top of the drum between its inlet and outlet. Each of the front heads 23 has an inlet 26 of angle shape as shown, and feed water pipe 20 connects directly with the inlet 26 of the foremost drum 21. The inlet 26 is at the top of the head; and the outlet 27 at the rear of the drum is also near the top of the head; so that the stream of water passing through the drum will necessarily flow along its topand will leave a comparatively quiet body of water in the bottom of the drum. The stream of water passes through the outlet 27 and then downwardly through the outlet passage 28 and through an angle connection fitting 29 which connects with the angle inlet fitting 26 of the next drum 2l, the water entering the next drum 2l at its top. Each drum is exactly similar to the others, the water entering each drum at the top, flowing in a stream along the upper part of the drum, and then discharging at the rear end into the outlet which carries the stream downwardly to the angle fitting which connects with the inlet angle fitting of the next drum. The water is finally discharged into the boiler through the last outlet angle fitting 29; or a suitable pipe may be connected with this outlet to discharge the water in any direction desired.

Each of the drums, is provided with a blow-ofil pipe 30 which reaches through the front head into the lowermost part of the drum; all. the pipes 3() being connected up with a main blow-off 31 which passes either to the front or rear of the boiler and has a. suitable valve 32 for its control. It will be seen that the drums are placed at a slight inclination; and this inclination is advantageous in causing the larger part of the scale to accumulate in a concentrated mass at the bottom and lower end of the drum where it is easily removed by the blow-ottq i e. p In order to insure the adequate heating of the water within the drums 21, I may provide that the water is heated in similar drums 2la arranged in combustion chamber of t-he boiler. These drums 2la are preferably. of the same construction as drum 2l excepting that they may be somewhat longer as is shown in Figs, l and 3. Drums 21a may be arranged along each side of the combustion chamber and across its back end; and the water may enter then through pipe 20a and leave then through pipe 2O which leads directly to the drums 2l within the boiler. The drums` 21a perform the same function as drums 21, the water being therein vheated and a portion of the scale precipitated and held. The drums 21a are constructed more heavily than the drums 2l; for, whereas the drums 2la must bear full boiler pressure within them, the drums 2l have practically balanced pressure within and without. As shown, the drums 2l are being constructed very lightly and economically, rTheir shells are made of light sheet iron and their heads are comparatively light casings. It is one of the specific features of my invention that the drums may be easily put into a boiler and removed by one man.

.As hereinbefore stated, the prime object ,of my invention is the boiling of the water at boiler temperature in receptacles or drums suitably adapted to settle and catch the scale so that it may be easily removed. For the accomplishment of this function, the broadest mechanical feature which I wish to herein claim is the combination of a.Y receptacle placed within the boiler and having means for settling the scale which? is precipitated from the water passed through the drum into the boiler. The means I employ is to create a comparatively large but quiet body of water within each drum, so that the passage of the feed water through the drum shall be sutiiciently slow to allow thorough settling of the scale. And it is also a feature which I wish to claim herein, to provide, in combination with such a settling means, a blow-oit tor removing the accumulated scale; which blow-off will normally remove all the accumulated deposit.Y But, should it become necessary to remove the drums for cleaning, this is very easily accomplished. One man alone can very easily disconnect the drums and pass them out the manhole, take them apart by removing the heads from the shells, clean them thoroughly, and as easily replace them in the boiler.

Having described a preferred form of my invention, I claim:

l. In a device of the class described, a receptacle comprising a drum of oval cross section and composedof a shell and a pair of heads, an inlet at the upper end of one head, an outlet communicating with the drum interior at the upper end of the other head and discharging near the lower .outside end of that head, and a blow-oiin pipe reaching through one of the heads to a point near the bottom of the drum.

2. In a device of the class described, a series ot' drums each of oval cross section and each comprising a shell and a pair of heads, an inlet at the upper end of one head, an outlet communicating with the drum interior at the upper end of the other head and discharging at the lower end of the outside of that head, the outlet discharge of one drum being rigidly connected directly with the inlet o t' an adjacent drum, the arrangement being such that each drum stands at a slight incline with itsinlet end lower than its outlet end, and a lblow-ott pipe for each drum extending ,from apoint adjacent the lowerinost part ofthe drum interior.

3'. InA combinationl with a steam boiler, a series ot receptacles within said boiler, each receptacle comprising a drum consist-ing of a shell and a pair of heads, an inlet at the top of one head, an outlet leading from the drum interior at ,the top of the other head, the outlet of one drum being connected direct-ly to the inlet of theneXt, a feed water pipe connecting toA the inlet of the first drum of the series Aand the outlet of the last drum discharging into the, boiler, and a blow-off pipe connecting into the lower most point of each drum.

In combination with a steam boiler, a series of receptacles within said boiler, each receptacle comprising a drum consisting of a` shell and al pair otheads, an inlet at the top of one head, :an outlet leading from the drum interior at the top of the other head, the outlet of one drum being connected directly to the inlet of the next, the arrangement being such that each drum stands in an inclined position with its inlet end slightly lowerv than its outlet end, a, feed water pipe connecting to the inlet of the first drum of the series and the out-let of the last drum discharging into the boiler, and a blow-ott pipe connected into the lowermost point of each drum.

5. In combination with a steam boiler, a series of substantially closed receptacles therein, each receptacle having an inlet and outlet at opposite en ds near its top, the outlet of one receptacle being connected directly to the inlet of the next, the arrangement being such that euch receptacle stands at an incline With its inlet end slightly lower than its outlet end, a feed Water pipe connecting to the inlet of the rst receptacle of the series and the outlet of the last receptacle discharging into the boiler, and a blow-ofiL1 pipe connecting into each receptacle near its 10 lowermost point.

In Witness that I claim the foregoing I have hereunto subscribed my name this 24th day of March, 1913.

VILLIAM O. HOPPE.

Witnesses:

JAMES T. BARKELEW, ELWOOD H. BARKELEW.

Copies o! this patent may be obtained for nve cents each, by addressing the Commissioner of Patents. Washington, D. C. 

